>>>>> "Alan" == Alan Stern <[EMAIL PROTECTED]> writes:
Alan> That's right. It is possible to submit them and have them queued,
Alan> by using USBDEVFS_SUBMITURB (asynchronous submission).
The Google Hits for USBDEVFS_SUBMITURB are not very helpfull to me, the
libusb usage of USBDEVFS_SUBMITURB in usb_urb_transfer() seems to
incorporate a wait and I also don't see how I can use if for control
messages.
Is there any understandable example for queued control messages for user
applications? Can I count on queued messages to be executed in order ?
...
>> I think this is a missbehaviour of our USB stack...
Alan> No, that's how it's supposed to work. The design is an
Alan> engineering compromise. USB host controllers only interrupt at
Alan> frame boundaries, not whenever a transfer is completed.
Apologizes, I should have done that before:
Boot XP, install usbview.exe and the FTDI device:
Also XP enumarates the USB2.0 Full speed device below an USB1.0 companion
hup and not the USB2.0 hub.
Good to know and understand, but bad for my project!
--
Uwe Bonnes [EMAIL PROTECTED]
Institut fuer Kernphysik Schlossgartenstrasse 9 64289 Darmstadt
--------- Tel. 06151 162516 -------- Fax. 06151 164321 ----------
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